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s1_compiler.py
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s1_compiler.py
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class Function:
def __init__(self, name):
self.name = name
self.pars = [];
self.uncompiledCode = []
self.code = dict()
self.variables = dict()
class Variable:
def __init__(self, name, func, reg):
self.name = name
self.function = func
self.register = reg
class Compiler:
'''Operations of Madhine:
1) MovOp - copy value from source to target.
2) ClearOp - assign empty set to target.
3) AddOp - add element to target set.
4) BinOp - make operation (+, *, - or ~) with arg1 and arg2 and assign result to res.
5) JumpOp - if test is empty, jump to one state, else to another.
6) DeconstructOp - if test is empty, jump to one state. Else select one element, assign it to element,
assign rest of test to rest, jump to another state.
7) AssertOp - raise error if test is empty.
8) PushOp - push values of registers to stack.
9) PullOp - pull values of registers to stack.
10) ReturnOp - return to return_state, specified by PushOp.'''
def __init__(self, parser):
self.tree = parser.parse()
self.code = dict()
main = Function("main")
self.functions = {"main": main}
self.next_var_register = 0
self.next_code_register = 0
self.next_id = 0
def findFunctions(self):
main_tree = []
for block in self.tree.blocks:
if type(block).__name__ == "Func":
func = Function(block.name)
self.functions[block.name] = func
func.pars = block.pars
func.uncompiledCode = block.code
else:
main_tree = main_tree + block
self.functions["main"].uncompiledCode = main_tree
def compile(self):
self.findFunctions()
for name in self.functions:
func = self.functions[name]
self.parseFunction(func)
if name == "main":
func.code[self.next_code_register] = ClearOp(self.next_code_register + 1, self.next_var_register)
self.next_code_register += 1
func.code[self.next_code_register] = JumpOp(None, None, self.next_var_register)
self.next_code_register += 1
self.next_var_register += 1
for name in self.functions:
func = self.functions[name]
self.parseCallsInFunction(func)
self.code = self.code.update(func.code)
return self.code
def parseFunction(self, func):
if func.pars.len > 0:
func.code[self.next_code_register] = PopOp(self.next_code_register + 1, \
[self.next_var_register + i for i in range(func.pars.len + 1)])
self.next_code_register += 1
for par in func.pars:
var = Variable(par, func, self.next_var_register)
func.variables[par] = var
self.next_var_register += 1
func.code.update(self.parseStatList(func.uncompiledCode, func))
func.code[self.next_code_register] = ReturnOp()
self.next_code_register += 1
def parseCallsInFunction(self, func):
for code_register in func.code:
op = func.code[code_register]
if type(op).__name__ == 'PushOp':
called_func = self.functions[func.code[code_register].next]
func.code[code_register].next = min(called_func.keys())
def parseFuncCall(self, call, func):
code = dict()
pars_registers = []
for par in call.pars:
var = Variable("temp_" + str(self.next_id), func, self.next_var_register)
func.variables["temp_" + str(self.next_id)] = var
self.next_id += 1
self.next_var_register += 1
code.update(parseExpr(par, var))
pars_registers.append(var.register)
code[self.next_code_register] = PushOp(call.name, [self.next_code_register + 1] + pars_registers)
self.next_code_register += 1
return code
def parseStatList(self, list, func):
code = dict()
for stat in list.stats:
if type(stat).__name__ in ['IfE', 'IfNe', 'WhileE', 'WhileNe']:
var = Variable("temp_" + str(self.next_id), func, self.next_var_register)
func.variables["temp_" + str(self.next_id)] = var
self.next_id += 1
self.next_var_register += 1
code.update(self.parseExpr(stat.cond, var))
register = self.next_code_register
self.next_code_register += 1
code.update(self.parseStatList(stat.stat, func))
if type(stat).__name__ == 'IfE':
code[register] = JumpOp(register + 1, self.next_code_register, var.register)
elif type(stat).__name__ == 'IfNe':
code[register] = JumpOp(self.next_code_register, register + 1, var.register)
elif type(stat).__name__ == 'WhileE':
code[register] = code[self.next_code_register] = JumpOp(register + 1, self.next_code_register + 1, \
var.register)
self.next_code_register += 1
else:
code[register] = code[self.next_code_register] = JumpOp(self.next_code_register + 1, register + 1, \
var.register)
self.next_code_register += 1
elif type(stat).__name__ == 'Return':
var = Variable("temp_" + str(self.next_id), func, self.next_var_register)
func.variables["temp_" + str(self.next_id)] = var
self.next_id += 1
self.next_var_register += 1
code.update(self.parseExpr(stat.cond, var))
code[self.next_code_register] = PushOp(self.next_code_register + 1, [var.register])
self.next_code_register += 1
break
elif type(stat).__name__ == 'Assign':
var_name = stat.var
try:
var = func.variables[var_name]
except:
var = Variable(var_name, func, self.next_var_register)
func.variables[var_name] = var
self.next_var_register += 1
code.update(self.parseExpr(stat.value, var))
else:
assert type(stat).__name__ == 'FuncCall'
code.update(self.parseFuncCall(stat, func))
return code
def parseExpr(self, expr, var):
code = dict()
func = var.function
if type(expr).__name__ == 'Var':
try:
var2 = func.variables[expr.name]
except:
var2 = self.functions["main"].variables[expr.name]
code[self.next_code_register] = MovOp(self.next_code_register + 1, var2.register, var.register)
self.next_code_register += 1
elif type(expr).__name__ == 'BinOp':
var2 = Variable("temp_" + str(self.next_id), func, self.next_var_register)
func.variables["temp_" + str(self.next_id)] = var2
self.next_id += 1
self.next_var_register += 1
var3 = Variable("temp_" + str(self.next_id), func, self.next_var_register)
func.variables["temp_" + str(self.next_id)] = var3
self.next_id += 1
self.next_var_register += 1
code.update(self.parseExpr(left, var2))
code.update(self.parseExpr(right, var3))
op = {"+": BinOpType.UNION, "*": BinOpType.INTERSECTION,
"-": BinOpType.DIFFERENCE, "~": BinOpType.SYM_DIFFERENCE}[expr.op.value]
code[self.next_code_register] = BinOp(self.next_code_register + 1, op, var2.register, var3.register, var.register)
self.next_code_register += 1
elif type(expr).__name__ == 'Set':
code[self.next_code_register] = ClearOp(self.next_code_register + 1, var.register)
self.next_code_register += 1
var2 = Variable("temp_" + str(self.next_id), func, self.next_var_register)
func.variables["temp_" + str(self.next_id)] = var2
self.next_id += 1
self.next_var_register += 1
for par in expr.pars:
code.update(self.parseExpr(par, var2))
code[self.next_code_register] = AddOp(self.next_code_register + 1, var2.register, var.register)
self.next_code_register += 1
else:
assert type(expr).__name__ == 'FuncCall'
code.update(self.parseFuncCall(stat, func))
code[self.next_code_register] = PopOp(self.next_code_register + 1, var.register)
self.next_code_register += 1
return code